# 812 简单：最大三角形面积

def largestTriangleArea(point):

    def getArea(x1, y1, x2, y2, x3, y3):
        return abs(x1 * y2 + x2 * y3 + x3 * y1 - x1 * y3 - x2 * y1 - x3 * y2) / 2

    return max(getArea(x1, y1, x2, y2, x3, y3) for (x1, y1), (x2, y2), (x3, y3) in itertools.combinations(point, 3))
